Logic Problems 

LogiGrid Logic Problems Puzzles
LogiGrid iPad
Do you sometimes feel that you need a mental tune-up?
Feel like your logical thinking skills aren't what they used to be?

LOGIGRID Logic Problems are a challenging and fun way to develop your deductive reasoning and critical thinking skills. If you regularly do logic puzzles then you know how addictive they can be. If you're new to logic problems, they're simple to learn so you'll be solving them within minutes.

Whether you have just a few minutes or a few hours, LOGIGRID's 25 original logic problems will entertain you while improving your ability to think and comprehend more clearly.
LogiGrid iPhone
Buy once and run on all Apple mobile devices! 

You can install LogiGrid on your iPhone, iTouch, and iPad. LogiGrid makes use of each device's unique features.
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Harmony Applications
Available on the App Store